This article presents an analytical solution procedure to investigate the geometrical impact of the magnet and the rotor core on the performance of slotted, surface-mounted permanent magnet (PM) synchronous motors. In particular, four different motor configurations with loaf-shape/regular arc-shape magnets mounted on the octagon/circular rotor surface are investigated, and their no-load (i.e., PM flux density, back EMF, and the cogging torque) and on-load (i.e., armature flux density, winding inductance, and electromagnetic torque) performance metrics are compared. The analysis is carried out analytically by using the concept of the surface magnetization current (SMC) and the superposition theorem. First, the stator slots are nullified, and Poisson’s equation is solved on a slot-less surface. The effect of the stator slots is then included by injecting equivalent SMC on the stator bore. For verification purposes, analytical results are validated via the finite element (FE) and experimental measurements on the motor prototype.

中文翻译：

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具有不同转子框架和磁铁形状的开槽表面贴装永磁同步电机的分析建模

本文提出了一种分析求解程序，用于研究磁铁和转子铁芯对开槽、表面安装永磁 (PM) 同步电机性能的几何影响。特别地，研究了四种不同的电机配置，在八边形/圆形转子表面安装了面包形/规则弧形磁铁，以及它们的空载（即 PM 磁通密度、反电动势和齿槽转矩）和负载（即电枢磁通密度、绕组电感和电磁转矩）性能指标进行比较。分析是通过使用表面磁化电流（SMC）的概念和叠加定理进行解析的。首先，定子槽无效，泊松方程在无槽表面上求解。然后通过在定子孔上注入等效的 SMC 来包括定子槽的影响。出于验证目的，分析结果通过有限元 (FE) 和电机原型上的实验测量进行验证。